PJ-585 Elevated Serum Deoxyribonucleasel activity During the Superacute Phase of Myocardial Infarctionion : Its Characteristics and Prognostic Value for Left Ventricular Function(Acute myocardial infarction, clinical (diagnosis/treatment)-10 (IHD) PJ98,Poster Session (Japanese),The 70th Anniversary Annual Scientific Meeting of the Japanese Circulation Society)